The Urinary System - Pearson

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calyces drains into a larger major calyx (shown in Figure 24.3a). Two to three major calyces, in turn, drain urine into the large collecting chamber that is the renal pelvis, which leads into the ureter. Smooth muscle tissue in the walls of the calyces and renal pelvis contracts to help propel urine toward the ureter. Both the

  System, Nidra, Urinary, The urinary system